Finding the Fourth Proportional to 16,692.56, 23,036.01 and 9,138.77

Step by Step Solution

1. Step 1: Write the proportion equation
   16,692.56 : 23,036.01 = 9,138.77 : x
2. Step 2: Convert to fraction form
   16,692.56/23,036.01 = 9,138.77/x
3. Step 3: Cross multiply
   16,692.56x = 23,036.01 × 9,138.77
4. Step 4: Simplify right side
   16,692.56x = 210,520,915.03
5. Step 5: Solve for x
   x = 210,520,915.03/16,692.56
6. Step 6: Final answer
   x = 12,611.66